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f9ab14e826
A RBD image can only be part of a single group. While an image is added to a group, check if the image is already part of a group, and return an error in case it is. Signed-off-by: Niels de Vos <ndevos@ibm.com>
80 lines
2.3 KiB
Go
80 lines
2.3 KiB
Go
/*
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Copyright 2024 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package rbd
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import (
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"context"
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"fmt"
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librbd "github.com/ceph/go-ceph/rbd"
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"github.com/ceph/ceph-csi/internal/rbd/types"
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)
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// AddToGroup adds the image to the group. This is called from the rbd_group
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// package.
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func (rv *rbdVolume) AddToGroup(ctx context.Context, vg types.VolumeGroup) error {
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ioctx, err := vg.GetIOContext(ctx)
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if err != nil {
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return fmt.Errorf("could not get iocontext for volume group %q: %w", vg, err)
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}
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name, err := vg.GetName(ctx)
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if err != nil {
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return fmt.Errorf("could not get name for volume group %q: %w", vg, err)
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}
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// check if the image is already part of a group
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// "rbd: ret=-17, File exists" is returned if the image is part of ANY group
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image, err := rv.open()
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if err != nil {
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return fmt.Errorf("failed to open image %q: %w", rv, err)
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}
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info, err := image.GetGroup()
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if err != nil {
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return fmt.Errorf("could not get group information for image %q: %w", rv, err)
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}
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if info.Name != "" && info.Name != name {
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return fmt.Errorf("image %q is already part of volume group %q", rv, info.Name)
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}
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err = librbd.GroupImageAdd(ioctx, name, rv.ioctx, rv.RbdImageName)
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if err != nil {
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return fmt.Errorf("failed to add image %q to volume group %q: %w", rv, vg, err)
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}
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return nil
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}
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// RemoveFromGroup removes the image from the group. This is called from the
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// rbd_group package.
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func (rv *rbdVolume) RemoveFromGroup(ctx context.Context, vg types.VolumeGroup) error {
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ioctx, err := vg.GetIOContext(ctx)
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if err != nil {
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return fmt.Errorf("could not get iocontext for volume group %q: %w", vg, err)
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}
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name, err := vg.GetName(ctx)
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if err != nil {
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return fmt.Errorf("could not get name for volume group %q: %w", vg, err)
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}
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return librbd.GroupImageRemove(ioctx, name, rv.ioctx, rv.RbdImageName)
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}
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